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R1EX24032ASA00A Schematic ( PDF Datasheet ) - Renesas Technology

Teilenummer R1EX24032ASA00A
Beschreibung Two-wire serial interface 32k EEPROM
Hersteller Renesas Technology
Logo Renesas Technology Logo 




Gesamt 22 Seiten
R1EX24032ASA00A Datasheet, Funktion
R1EX24032ASA00A
R1EX24032ATA00A
Two-wire serial interface
32k EEPROM (4-kword × 8-bit)
www.DataSheet4U.com
REJ03C0346-0001
Preliminary
Rev.0.01
Dec. 28, 2007
Description
R1EX24xxx series are two-wire serial interface EEPROM (Electrically Erasable and Programmable
ROM). They realize high speed, low power consumption and a high level of reliability by employing
advanced MNOS memory technology and CMOS process and low voltage circuitry technology. They
also have a 32-byte page programming function to make their write operation faster.
Note:
Renesas Technology’s serial EEPROM are authorized for using consumer applications such as
cellular phone, camcorders, audio equipment. Therefore, please contact Renesas Technology’s
sales office before using industrial applications such as automotive systems, embedded controllers,
and meters.
Features
Single supply: 1.8 V to 5.5 V
Two-wire serial interface (I2C serial bus)
Clock frequency: 400 kHz
Power dissipation:
Standby: 2 µA (max)
Active (Read): 1 mA (max)
Active (Write): 3.5 mA (max)
Automatic page write: 32-byte/page
Write cycle time: 5 ms
Endurance: 106 Cycles
Data retention: 10 Years
Preliminary: The specifications of this device are subject to change without notice. Please contact your
nearest Renesas Technology’s Sales Dept. regarding specifications.
REJ03C0346-0001 Rev.0.01 Dec. 28, 2007
Page 1 of 20






R1EX24032ASA00A Datasheet, Funktion
R1EX24032Axx00A
Timing Waveforms
Bus Timing
SCL
www.DataSheet4U.com
SDA
(in)
SDA
(out)
WP
tF
tSU.STA
tHD.STA
tAA
tSU.WP
1/fSCL
tHIGH
tLOW
tHD.DAT
tSU.DAT
tDH
tR
tSU.STO
tBUF
tHD.WP
Write Cycle Timing
Stop condition
Start condition
SCL
SDA
D0 in
Write data
(Address (n))
ACK
tWC
(Internally controlled)
REJ03C0346-0001 Rev.0.01 Dec. 28, 2007
Page 6 of 20

6 Page









R1EX24032ASA00A pdf, datenblatt
R1EX24032Axx00A
Write Operations
Byte Write:
A write operation requires an 8-bit device address word with R/W = “0”. Then the EEPROM sends
acknowledgment "0" at the ninth clock cycle. After these, the 64kbit EEPROM receives 2 sequence 8-bit
memory address words. Upon receipt of this memory address, the EEPROM outputs acknowledgment "0"
and receives a following 8-bit write data. After receipt of write data, the EEPROM outputs
acknowledgment "0". If the EEPROM receives a stop condition, the EEPROM enters an internally-timed
write cycle and terminates receipt of SCL, SDA inputs until completion of the write cycle. The EEPROM
returns to a standby mode after completion of the write cycle.
www.DataSheetB4yUt.ceoWmrite Operation
Device
address
32k 1 0 1 0
Start
1st Memory
address (n)
W
ACK
R/W
Note: 1. Don't care bit
2nd Memory
address (n)
Write data (n)
ACK
ACK
Stop
REJ03C0346-0001 Rev.0.01 Dec. 28, 2007
Page 12 of 20

12 Page





SeitenGesamt 22 Seiten
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